/
client.go
78 lines (69 loc) · 1.58 KB
/
client.go
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package multi_get
import (
"context"
"fmt"
"golang.org/x/sync/errgroup"
"log"
"math/rand"
"os"
"time"
"github.com/kirillgrachoff/load_tester/pkg/net/xhttp"
)
type MultiGet struct {
count int
url []string
keepAlive bool
sleepOnError bool
r *rand.Rand
}
type Logger interface {
Println(v ...any)
Printf(format string, args ...any)
}
func NewClient(count int, url []string, keepAlive, sleepOnError bool) *MultiGet {
return &MultiGet{
count: count,
url: url,
keepAlive: keepAlive,
sleepOnError: sleepOnError,
r: rand.New(rand.NewSource(42)),
}
}
func (g *MultiGet) Run(ctx context.Context) (err error) {
group, ctx := errgroup.WithContext(ctx)
for i := 0; i < g.count; i++ {
logger := log.New(os.Stdout, fmt.Sprintf("(index: %4d) ", i+1), log.Flags())
group.Go(func() error {
return g.worker(ctx, logger)
})
}
err = group.Wait()
if ctx.Err() != nil {
log.Println(ctx.Err())
}
return
}
func (g *MultiGet) worker(ctx context.Context, logger Logger) error {
logger.Printf("start querying")
count := 0
for {
index := g.r.Intn(len(g.url))
select {
case <-ctx.Done():
return nil
case resp := <-xhttp.Get(g.url[index]):
if resp.Err != nil {
logger.Printf("total count: %6d | error while query: %s | time: %s", count, resp.Err, resp.Time)
if g.sleepOnError {
time.Sleep(time.Second)
}
} else {
if !g.keepAlive {
resp.Response.Body.Close()
}
logger.Printf("total count: %6d | status: %s | time: %s", count, resp.Response.Status, resp.Time)
}
count++
}
}
}